Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0dd1a686ffde82a6eb32f6919e0ccbf157bae967e82736a3dc275b02bc053dbd' 
  AND token = '1VTrWDXIsq7FbdyP2UTmhrdzBSqSQOfUvf3Ckx9FF0M=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}